67770864 has 160 divisors (see below), whose sum is σ = 226096640. Its totient is φ = 19035648.

The previous prime is 67770839. The next prime is 67770907. The reversal of 67770864 is 46807776.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220599 + ... + 220905.

It is an arithmetic number, because the mean of its divisors is an integer number (1413104).

Almost surely, 2^67770864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67770864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113048320).

67770864 is an abundant number, since it is smaller than the sum of its proper divisors (158325776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67770864 is a wasteful number, since it uses less digits than its factorization.

67770864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The square root of 67770864 is about 8232.3061167573. The cubic root of 67770864 is about 407.7065363748.

The spelling of 67770864 in words is "sixty-seven million, seven hundred seventy thousand, eight hundred sixty-four".